Coursy Rosenthal Boxes for Indoor Air Quality

Coursy Rosenthal boxes were invented kind of right at the start of the pandemic. If you're not crafty at all or have no real tools, you can still make it work. I built one a couple of years ago when it should happen in Portland as did several people I knew and they're not hard to do. The most common size of box that you can build will allow. It'll basically change the air out in a room five full times per hour in a 500 square foot room.